2003 1500 4x4 4.7 going up long hills , temp gauge starts creeping up.replaced radiator, was original,195 thermostat,auto zone water pump, plastic impeller,it is shaped like 2 round dics with vanes in middle.still runs hot on a pull. any help is appreciated.not losing any fluid, bled system, correct anti freeze, new mopar heavy duty clutch fan bottom hose not collapsing.